Motor.



D. S. WAUGH.

MOTOR.

APPLICATION FILED SEPT. 9, 1913.

Patented Mar. 17, 1914.

4 BHEETSBHEET 1.

D. S. WAUGH.

MOTOR.

APPLICATION FILED SEPT, 9, 1913.

1,090, 1 79. Patented Mar. 17,1914

Z4 4 SHEETS-SHEET 2- D. S. WAUGH.

MOTOR.

APILIOATION FILED SEPT.9, 191a.

Patented Mar. 17, 1914 4 SHEETS-SHEET 3.

D. S. WAUGH.

MOTOR.

APPLICATION FILED SEPT. p, 1913.

Patented Mar. 17, 1914.

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DANIEL S. W'lt llt-"rF Oil" DENVER, COLORADO, ASSIGNOR T130 THE DENVER ROCK DRILL COIvILEANY, OIE\DENVER, COLORADO, A CORPORATION OF DELA- MOTOR.

onnie/e.

Specification of Letters Patent.

.lfntcnted Mar. 17, 19114.

Application filed September 9, 1913. Serial No. 738,845.

I all whom it may concern Be it known that l, IMnjncn l \Vauun, a citizen oi the United States, residing: at

or, in the coinlty oil Denver and State lolorado. have invented new and useful. lann'ovennmts in h'lotors, of which the following a spcciihmtion.

The present invention relates to motors operated by lluid under pressure, and "while m-iinarily intended for use in connection with rock drilling machinery, it is not neces saril y limited to such operations.

As is well known to those skilled in the art, there is a great advantage in employing a short stroke and securing a comparw tivcly light blow when first starting to drill a hole in a rock, and there is the same advantage when. drilling through What is t and bad ground, namely, rock which all of seams and fissures, for in the latter he drill bit is more apt to stick and so": the machine it a long stroke with a "ul'lrllqllhlll j hard blow is struck. After a hole is started, however. and under ordinary conditions, the long stroke is desirable.

Nmv, the primary object of the present in vention is to provide novel, simple and ef fectivc means, whereby the stroke of the machine can be varied, the throttle valve, which controls the supply of motive fluid to the motor being employed as the controlling means for varying, the stroke. -A simple embodiment of the invention that has been found in use to be entirely practicable and satisfactory, is illustrated in the acecn' panying drawings, wherein Figure 1 i;--' a lol'igritudinal svctirmal view throngh'a portion oi a motor Containin'r the improvcmonts. 2 is a cross so cool view of the sums. Fig. 3 is a l mtal sectional view on the line 3"? of Fin: 1. Pi and are detail sectional views. illustr: .inp the throttle valve in its diil'erent controlling positions to vary the stroke of the piston. Fig. (3 is a view that is diagrammatic in its character, showing various of the passages and ports disposed in substantially the same plane in order to more fully disclose the operation of the mechanism. Fig. 7 is a sectional View on the line 7-Z of Fig. 1. Fig. 8 is a detail perspective view of the distributing valve and part of the elemeuts associated therewith.

nut 13 carried by the piston and arranged within the same.

Mounted longitudinally upon the cylinder member 9, and preferably forming an integral part of the same, is a longitudinally disposeddistributing valve casing 1 1, which is provided with an open-ended internal chamber having a central internal annular groove 15 and other similar grooves 16 and 17 arranged on opposite sides thereof. A motive fluid supply passageway 18 leads to the central groove 15, and is controlled by a tapered throttle valve 19 journaled transvcrsely in the cylinder member between the piston chamber and the valve casing. This valve 19 has a stem 20 projecting from one side of the cylinder member, and the projecting portion carries a handle 21 provided with a series of depressions 22 arranged to receive a spring-pressed holding plunger 23. The tapered portion 19 of the valve-is pro vided with a port 24 opening through its largerend and through one side, the side opening affording communication with the passageway 18, as will be clear by reference to Fig. 2. Threaded into the side of the cylinder member, opposite the projecting stem 20, and in line with the open end of the valve 19, is a coupling 25 comprising a pair of telescoping socket elements 26 detachably threaded together and inclosing the ball end 27 of a motive fluid supply connection 28. It will thus be seen by reference to Figs. 1, 2 and 6, that the valve may be turned either to a position to admit motive fluid from the supply conduit 28 to the central groove 15 of the valve casing, or to a position to cut ofl'such communication. I

Leiu'ling from the two annular grooves 16 of the valve casing, are distributing passageways 29 and 30 that respectively open into the rear and front portions of the cylinder member. Detachably fitted in the opposite end portions of the distributing valve chamber, are"bushings,31 having flanges 32 that rib bear against the ends of the casing. These bushings are'provided with internal annular grooves 33 that communicate respectively with the grooves 16, an consequently with the passageways 29 and 30, as illustrated'at 34:. Their inner or adjacent ends are slightly spaced apart to afford open communication with the annular groove 1-5. An automatic reciprocatory distributing Valve 35 is mount-' ed in these bushings, and has a central peripheral enlargement 36*that is arranged to slidingly contact with the inner end portions or the bushings and bridge the spaces be tween them. It is also provided at its ends with enlargements 37 that sliding'ly engage the bore walls of saidbushings. The valve is preferably hollowed out from its ends, as illustrated at 38. Flanged caps 39 close the outer ends of the bushings and are held. in place by cross heads 40, hearing thereagainst and secured by bolts 41, which extend longitudinally through the valve casing on opposite sides of the valve chamber. The exhaust from the motor takes place through comparatively large outlet ports 42 in communication with each other, shown at 43, and also in communication with the end grooves 17 ot the valve chamber. These end grooves 17 are in turn in communicationwith the interiors of thebushings 31 through openings or ports al bored. therethrough. With this structure, it will be evident that if the distrilmting valve 35 is in its right hand position, as illustrated in Fig. 1,.inotive fluid under pressure, passing through the open throttle valve 19, will enter the groove l 5, and passingbctween theinner ends of the bushings 31, it will be directed to the rear groove 16, and thence entering the passageway 99, will be delivered into the rear end of the cylinder member, moving the piston iorvard. The fluid in advance of the piston will exhaust through the passageway 30, the grooves 16, the connnuuiiating ports 34-, and

thence through the ports ll and. foremost groove 1'7, finally exhausting through the ports 4:2. The movement of the distributing valve 35 to its rcarmost position will reverse the operation. the motive fluid then enteriug the passageway 30 and drivin the piston rearwardly, whereupon the motive fluid in rear of said piston will exhaust through the passageway 29 and the rear-mostports ll, escaping in like manner through the ports The means for effecting the operation of the distributing? valve is as follows. A passageway 45 bored longitudinally in the cylinder member and opens thrcuigh av port 46, into the front-portion thereof, normally in advance of the piston 10. l his passageway, shown at 17, in Fig. '7, leads to the rear end of the valve chamber, where it communicates with an annular groove 8, formed in the rear cap 39. This groove communication through ports -19 with a bore in the cap, so that it there is motive fluid under pressure in the front portion of the cylinder member, when the piston moves rearwardly and uncovers the port 4:6, this motive fluid will pass through said port 46, the passageway 45, the passage t't', into the rear eud of the distributingvalve chamber, and. operating against the rear face of the valve 35, will' force it forwardly. As already explained, this will. result in fluid under pressure being delivered through the passageway 29 into the rear portion of the cylinder member, thereby driving the piston forwar'dQ Now there is provided, illustrated particularly in Fig. 6, another passageway 51 that opens through ports 52 in the front cap 39 into the front end of the distributing valve chamber, and this passageway 51 has communication with the rear portion of the cylinder member through two ports 53 and 54, one being arranged in fill Vance of the other. The piston successively uncovers these ports. The communication between the rear port 53and the passageway 51 is established through the medium of the bore in which the throttle valve 19 operates, or in other words, the rear end of the passageway 51 and the outer end of the port 53 open into said bore, as will be clear by reference to 6. Thevalve 19, if. construoted in the ordinary manner, would thus cut oil all communication between the ports 50 and 51, but it is provided with a cut-away portion 55, this cut-away portion being of suilicient length so that when the valve 19 is in one position, as illustrated in 5 and (3, it permits communication between the port 53 and the passageway. i Vheu, however, the valve 19 is fully opened, as illustratcd in Fig. 4:, then comnuuiication be. tween the said port 53 and the said passageway 51 is cut oil.

Referring more especially to Fig. 6, the operation of this portion of the mechanism is as follows. lVhen the machine is initially started For the purpose of beginning a drill hole, the throttle valve 19 thrown to the position illustrated in Figs. 5 and (i, and this position will be indicated as will he apparent by the plunger 23 engaging in the proper recess 29. in the handle 21. lt will thus be obvious that upon the forward stroke of the piston, as soon as said piston uncovers the port 53, motive fluid under pressure will pass through said through the cut away portion 55, entering the passageway 51, and thus being admitted against the front end of the distributing .valve, the valve will immediately be shifted to its rearniost position, \vhereupon the piston will start on its'reur stroke. lflhowever, the throttle valve 19 is thrown fully open. then the port 53 will be cut oil from commuuimition with the passageway 51, and

port,

be apparent to those skilled in the art, vvithout further description, and it will be understood that various changes in the size, shape, proci'l1imi and minor details of constructioi'i may be resorted to without departing from the spirit or sacrificing any.

of the advantages of the invention.

Having thus fully described my invention, what I laim as new, and desire to secure by Letters Patent, is:-

1. In a motor of the character described, the combination with a cylinder member and a piston operating therein, of means for supplying fluid under pressure to the motor, an automatic shiftable distributing" valve for the motor, means for changing, the period of operation oi. the distributing valve to vary the stroke of the piston, and a throttle valve controlling the motive fluid supply to the motor and. the means for changing the period of operation of the valve.

2. In a motor of the character described, tlie combination with a cylinder member and a piston'operating therein, of means for supplying fluid under pressure to the motor, an automatic shiftable distributing valve for the motor,'means for changing the period of operation of the distributing valve to vary the stroke of the piston, including a plurality of ports for supplying motive fluid to the distributing valve, and common means for controlling the motive fluid supply to the motor and for controlling one of said ports.

3. In a motor of the cha 'acter described,

the combination with a cylinder member and a piston operating therein, ofaneans for supplying fluid under pressure to the motor, an automatic shiftable distributing valve for the motor, means for changing the period of operation of the distributing valve to vary the stroke of the piston, including a plurality of ports for supplying motive fluid to the distributing valve, and a single valve for controlling the motive fluid supply to the motor and for controlling one of said ports.

4. In a motor of the character described, the combination with a cylinder member and a piston operating therein, of means for supplying fluid under pressure to the motor, an automatic shiftable distributing valve for the motor. means for changing the period of operation of the distributing valve to vary the stroke of the piston, including a plural ty of ports for supplying motive fluid to the distributing valve, and a single rotary throttle valve disposed transversely of the cylinder member and controlling the motive fluid supply to the motor and the passage of motive fluid through one of the ports.

5. In a-motor of the character described, the combination with a cylinder member and a piston Opfllittlllg-tll0l0lll, of means for supplying motive fluid to the motor, an automatic distributing valve, means for clienting the shifting of the valve, including a plurality of ports covered and uncovered by the piston on its movement, and a throttle valve controlling the motive fluid supply to the motor and one of the ports.

6. In a motor of the character described, the combination with a cylinder member and a piston operating therein, of means for supplying motive fluid to the motor, an automatic distributing valve, means for effecting the shifting of the valve in one direction, including a plurality of ports opening into the cylinder member and successively covered and uncovered by the piston on its movement, and a throttle valve controlling the motive fluid supply and having a portion that is movable to and from a position to cover one of the ports.

7. In a motor of the character described, the combination with a cylinder member and a reciprocatory piston operating therein, of a valve casing, a motive fluid supply passage leading to the valve casing, and distributing passages leading from said valve casing, to the cylinder member, an automatic distributing valve in the valve casing. means for efiecting the shifting of the valve including a plurality of ports opening into the cylinder member and successively covered and uncovered by the piston in its movement, and a rotary throttle valve controlling the motive fluid slipply passage and one of the ports.

8. In a. motor of the character described, the combination with a cylinder member and a reciprocatory piston operating therein, of a valve casing mounted on the cylinder member, a motive fluid supply passage leading to the valve casing, distributing passages leading from the valve casing to the cylinder member, an automatic distributing valve in the valve casing, means for shifting the automatic valve in one direction, comprising a passageway leading from the cylinder member to the valve casing and having a plurality of ports opening into the cylinder member and successively covered and uncovered by the piston, and a rotary hollow throttle valve located in the supply passage and controlling the same, said valve having a portion movable across one of the ports to open and close said port.

9. In a motor of the character described, the con'ibination with a cylinder member and a piston operating therein, of means for supplying motive fluid to the motor, means for varying the stroke of the piston, and a throttle valve disposed transversely of the cylinder member and controlling the motive fluid supply and the piston stroke varying means.

10. In a motor of the character described, the combination with a cylinder member and a piston operating therein, of means for supplying motive fluid to the motor, means for varying the stroke of the piston, and a rotatable throttle valve journaled in the cylinder member transversely thereof and controlling the motive fluid supply and the piston stroke-varying means. i v,

11. In a motor of the character described, the'combination with a cylinder member and a piston operating therein, of means for supplying n1otive; fii1id to the motor, including a supply passageway, means for varying the stroke of the piston, including a motive fluid passageway, and a valve for controlling both passageways, said valve autonatically moving toward a closed position across one passageway when moving to an open position with respect to the other.

'12. In a motor of the character described, the combination with a cylinder member and a piston operating therein, of means for supplying motive fluid to the motor, including a supply passageway,'means for varying the stroke of the piston, including a motive fluid passageway, and a single valve journaled transversely of the cylinder member and movable across bothpassageways, said valve automatically moving toward a closed position across the motive fluid supply passageway when moving to an open position with respect to the stroke varying passageway.

13. In a motor of the character described, the combination with a cylinder member, of a piston operating therein, an open-ended valve casing having distributing ports communicatin g with the cylinder member, shiftable bushings extending into the valve casing from its opposite ends and terminating short of each other, a reciprocatory distributing valve operating in the bushings,

means for introducing motive fluid between the inner ends of the bushings, and caps bores communicating with the distributing ports, means for introducing motive fluid between the bushings, and an automatic dis tributing valve operating in the bushings and having aperipheral enlargement between its ends that moves across the space between the bushings and alternately enters their adjacent ends to alternately admit the motive fluid to and cut it oll' from each bushing. I

15. In a motor of the character described, the combination with a cylinder member, of a piston therein, a valve casing that distributing ports communicating With the cyl inder member, bushings in the valve casing terminating short of each other and having bores communicating with the distributing ports, the inner ends of said bores being enlarged, means for introduping motive fluid between the bushings, and an automatic distributing valve operating in the bushings and having peripheral enlargements at its ends that reciprocate in the outer portions of the bushing bores, said valve having central peripheral enlargement of greater diameter than the end enlargements and said central enlargement moving across the space between the bushings and alternately entering the enlarged portions of the bores thereof to alternately admit the motive fluid to and cut it oil from said bushings.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

DANIEL S. XVAUGH.

W'itnesses WILLIAM H. LEONARD, Jnssm TURNER. 

